import React, { Component } from 'react'
import ReactDOM from 'react-dom'
import './16_style.css'
class App extends Component {
  render () {
    // class 作为关键字，写样式使用className
    return (
      <div className="test">
        欢迎来到react的世界
      </div>
    )
  }
}
ReactDOM.render(
  <App />,
  document.getElementById('root')
)